Add error module

lib/entry/libimagentryfilter/Cargo.toml

@@ -27,6 +27,7 @@ regex = "0.2"
 semver = "0.8"
 toml = "0.4"
 toml-query = "0.6"
+error-chain = "0.11"
 
 libimagstore    = { version = "0.8.0", path = "../../../lib/core/libimagstore" }
 libimagentrytag = { version = "0.8.0", path = "../../../lib/entry/libimagentrytag" }

lib/entry/libimagentryfilter/src/error.rs

@@ -0,0 +1,34 @@
+//
+// imag - the personal information management suite for the commandline
+// Copyright (C) 2015-2018 Matthias Beyer <mail@beyermatthias.de> and contributors
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; version
+// 2.1 of the License.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+//
+
+error_chain! {
+
+    types {
+        FilterError, FilterErrorKind, ResultExt, Result;
+    }
+
+    foreign_links {
+        TomlQueryError(::toml_query::error::Error);
+    }
+
+    errors {
+    }
+
+}
+

lib/entry/libimagentryfilter/src/lib.rs

@@ -38,6 +38,7 @@ extern crate regex;
 extern crate semver;
 extern crate toml;
 extern crate toml_query;
+#[macro_use] extern crate error_chain;
 
 extern crate libimagstore;
 extern crate libimagentrytag;
@@ -46,6 +47,7 @@ extern crate libimagentrytag;
 // these depend only on libimagstore
 
 pub mod builtin;
+pub mod error;
 
 // extended functionality of the crate
 // these depend on other internal libraries than libimagstore and use the upper core modules for